diff --git a/dlls/wined3d/texture.c b/dlls/wined3d/texture.c
index 87ae569b549..d164819a10a 100644
--- a/dlls/wined3d/texture.c
+++ b/dlls/wined3d/texture.c
@@ -2793,7 +2793,7 @@ static void wined3d_texture_gl_download_data_slow_path(struct wined3d_texture_gl
         {
             GL_EXTCALL(glBindBuffer(GL_PIXEL_PACK_BUFFER, bo->id));
             checkGLcall("glBindBuffer");
-            GL_EXTCALL(glBufferSubData(GL_PIXEL_PACK_BUFFER, 0, sub_resource->size, src_data));
+            GL_EXTCALL(glBufferSubData(GL_PIXEL_PACK_BUFFER, (GLintptr)data->addr, sub_resource->size, src_data));
             checkGLcall("glBufferSubData");
         }
         else